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Question

What is the source of energy that flows through the living world?


A

Photosynthesis

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B

Sun

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C

Respiration

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D

ATP

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Solution

The correct option is B

Sun


The correct option is B.

Explanation of the correct option:

  1. The energy from the sun is the ultimate source of energy for all living things.
  2. The solar energy is utilized by the green plants or autotrophs to synthesize food by the process of photosynthesis.
  3. Sunlight is captured by the chlorophyll pigment present in the leaves of the plant.
  4. Every living organism directly or indirectly depends on the sun as it helps in energy flow.

Explanation of the incorrect options:

Option A:

Photosynthesis is the natural process by which green plants make their own food (autotrophic nutrition).

Option C:

Respiration is an important biological process in plants that uses oxygen to release energy.

Option D:

ATP is the principal molecule for storing and transferring energy in cells.

Final answer: The source of energy that flows through the living world is the Sun.


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